Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea4ce10db0d7dd2d3c878374ff04aa7b69053fea9e9bbebdb00c7f3401779415' 
  AND token = 'qm6+oG6r3R3oMgcpfwzXWAjgIpbBgF0hUnbu6KSAUHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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