Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12f9dfbc0484ceda7e2e32a33bb6a4fb0cdfbc3762d3a3e2318e78e606d877d8' 
  AND token = '7RmQZ5zNk5aQPEV7wMRFURVcstgmjlyazcsoh/8bX00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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