Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8b1507c09a6e2e9b22809676e19675837e289214bb81542fa0dd2cfe8e8e1d7' 
  AND token = 'aQoA90eEdfeOZkshCO0uaUmcALLQDY8YDpFdbctfjHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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