Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcfcfd89e8ad8384c2c046f5ad384faa9a316c026c295bb08aac7506fed3ed1a' 
  AND token = 'uYYsZicWyV9fSBwr5V4zRKb20b49z2Nw45k1BlFIBZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}