Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90877d863aabd15855470bf5c9771419220984a3546bd9fd71cdf7f74fcf9b12' 
  AND token = 'si8FD+5R7J0xTqll8ouQyLThOTJWghnE55zrDLDR7pY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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