Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4276d257fba4fbae5a7eb1891b7f5b43e27b8c0b5f201a2cd1f77b70f488ebc3' 
  AND token = 'QcPb5zRpONqFDpwkN9akmdq3Ie7fyDsA/Eb2PJUOgWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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