Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c9b3168df7319ae58a7a0e8aa9e8f3f38f26665aaf78442e2017adb3929bd83' 
  AND token = 'nHsaHYrS3yOF42Gsl4o7rsFIb84cdeqUL1VSMJbPJMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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