Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e208430e82507511993196ee544262b6956d96c195ec5010b652619f1476fd06' 
  AND token = 'gM1VTK/MgkyHaCLnof9YsfQi9gpbz9apQZUfjIrOo+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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