Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac3f3ded0e9812b3e121f9c271f8561344e77ed063ef230f695dfee5a01ec15' 
  AND token = 'AnNEnRjzoTt65hfCRv5Yh1eVysGqVhsUa0Rv5pSuqqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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