Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bf4ed4377a04744ff3f578315bd8b9fafd60868cfe573f9898e23b19d20d60d' 
  AND token = 'xuBi7LPY2UWnEb7tBdQD7vGZvk/i/eEzEfZ2HZGtFxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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