Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f78972bc3fb152a7e3b6976f2631251af2fe6f0343fc83e60b7a52b264b762f' 
  AND token = 'X+bM5BvFED0TROxnB0+ap3XHo2KVFASd8UFNtsjEO+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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