Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f6ee01ac38e30c5a579c20a31553a4da34ea146fd4c9e62a290f75314117555' 
  AND token = 'bDIQ2OUERcfZ3LeKeiicfibifU4As5Zf+E4QYsEgAGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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