Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c01c27517ac39d882a1dfa8c54a5cad8521cee53d931eb03aff323076686ddd' 
  AND token = 'cDnY0ye3EAa6FJSL9QRgFV3GnGgStqRgai3hzdzvIQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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