Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b1caa26025e9565f20af7bbe2ab563c944ab38dcd4415b61269c1cc85326faa' 
  AND token = 'hO46wmBQlECf93E7LJDBRP5H1z5/i367WlvA6DhpgjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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