Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d1d7fdf4ef1988bc9a0ba99aa5eadac9b1ef012ec174aabaf7f19bbf7dc4cb2' 
  AND token = 'yNFyuHHQEsWWFBeYbTdcD1T+N8UwFHae/OiH9Wq/KN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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