Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2d455bd1f0bda7b59f85a66565ecc848da1912f205726d59c8714283544d673' 
  AND token = 'S09k41le6MW0eeXQZokX/fWOklmZ5aVC10REXQlnvL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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