Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a5ecc6be6a28647aecbc27ce9c4150521e1a7ca2fb33700d9b8cbc057ba0d3e' 
  AND token = 'v7DNqGNqvoh2sLP+zq/hrZDJhf7+UQzpcXoPCeKZoqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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