Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b877329bb8196cf57571aa5824e81c414224878dc8e8922debc1c107e2f47196' 
  AND token = 'PABkJMXyjnEthjbCAS4GyQ2S6C1X2beyA1z77f+zNbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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