Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c4e1e37c59073f2acd5769b1f6a2ee5920c963a34ba110c350f148c1dd42e8b' 
  AND token = 'Cq/aBTCrwBzCq3zcl2epUaf2kDETqPSBX69V6kffEFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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