Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd357894b72369aedc3b621b3adec57c4faec0d110f3c4c73675453fa6eff6797' 
  AND token = 'asaJGks4ZbAP+00pePSn+9NRrHJZymCI3ZKJO1fRUcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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