Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38ec051ac18d81d4aa7c9b1db6cca60671d1ab0a66d199f2c39f62694491d353' 
  AND token = 'EXNE4G9Zw/tGZ2NymEshMsSKC76/zDLHKRwumw2DIFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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