Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4586a1df3990a8840d5bf53470de39872f1339aa776434bd8dfe2dfa199ccd6a' 
  AND token = 'HbyNUIw/NBPVbHbpocr0Opj4nZTnwC9x6cSnHrFYZyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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