Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3c900985b8af915317bbfddff324c5ee61dbca1091ba908eba7556fae9adfaf' 
  AND token = '2YpreAFfpHK/Ve4kQja9jwkWI1ChvDfVdRlL0DQdtzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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