Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fce0d328219c94f0714f36cdeb14ebf9da036b30451caa44901c4f1710abd9e8' 
  AND token = 'YW1KwlGFEO2cEoMO3aiCXLjq/h6baM7fEAoapsJ2VrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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