Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4d49c453458864e4b6f80f8238e57aa2ca1887310e349692ffb8226e55d2caa' 
  AND token = 'IeLzkG1d4HK6hI9jxSdItsSJp/XmM29+w/EKhtCew3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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