Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65f7cffb49b574b3c012431c6eb7271b1ab0808737b18e5115712f54398ad51d' 
  AND token = 'ejdjSSOT33jarlvDREgt1PmXNoXHfybHEv/x0oE7z78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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