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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7332506c5b5d6139caaaa4b28408d8ad0ca0fd4dfa8f190cf19aef2f86686df0' 
  AND token = 'd8+w1ZiCXwRUY+GNBdX1Sa/l5HfQHqOf8KMgH4mxX0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}