Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73f80da35f84d9f956a16cdd61245404a5c6ed5ec9e0f4f86e2362cd5c646375' 
  AND token = '+pooLXsu0MWa5wWMllNffY6fwW8xY1tYSNymSgj/aKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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