Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75da9972ccbb8cb5ff20734b17b2b992ce0e8c6f95ebb7fb8b31a672eac752b7' 
  AND token = 'cVKh5JhUGAvKU7jbUGs9ttIVlR8zq2TutWirKnjFIVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}