Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bbe8f8816458ed241f9822ca1e7a3e418a9705a814461ac9d6956da08a602a7' 
  AND token = '2wsiyXMQwVJmESabyqI/SfgEr45kjAAWs61KhYjcaBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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