Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3c7225e811f1fe04ec901a9a7ad9cc2fac9c470c01128c9be3eaf6a133ed78b' 
  AND token = 'RNm98oMEICYqdKAVfJ3b3CH9ZKmUu94nGU+nEpdDjmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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