Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b7588457cf864115bb4cc6bbdd8699469071ec22cb227da651ec6131d9d268d' 
  AND token = 'OiIMQmVkj0P1SOXqgo70qHOSQksK0SdRLDrrqOLJ8OU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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