Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '370e9c156c43caf782700d4e5c465f6456527d03d87331d23fb556448a8a7fe7' 
  AND token = 'Tx4axkOs4UXEeMz2agETrCLmgD9a+tgTC4G/+N2OZec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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