Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80326328123d153e3dfb8977e81421ab5adc6fb173ceed6950bbc5d0231fede2' 
  AND token = 'r7CEOFI58gneIqZanUzcDAjSS9xyR/ffYTRgubNDn8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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