Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efbc5f88266410ce11544caaa3a4e731568006a314bed887e0793b2f9bd45bb0' 
  AND token = '0BEhryG+ysj0uD5rxPV5f8HW7nlIRDNFsaFMGGQw+TU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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