Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4079d83bf5d75d10137bec1fd3714a6891313b60cddcfd35bd969e8a5ff3d80' 
  AND token = '7jDf5FjZFoKubp0hhKAv4/TuGb7ulAqCTWSGMD15tU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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