SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba848582a3e54eed35984f04826bfa92b7278146bc02587d77de06330908ab14' 
  AND token = 'p35wxf5JYnt3T37HiygNMQxZyu/yrSRBWOK+16gCQVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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