Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10a2ec6959afff4b3946b74c0cb75555207ae536b59f310e48ed0e95a161e82c' 
  AND token = '+U2yG+ISVxmbD450t2plO14lycRxhthAbXecpQ3K+9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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