Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8517c3c3d0d521ad0a129903b6c2e8c5a5638e5d74782569831a41feab44a09' 
  AND token = 'Fq0WdjftZTev+gwc061fhYSUR8V4WOITCuMzV9l0Jcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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