Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fef5dc14a6c7c8d6a66b4fc246fb57921da6043a6e1069531ccbb1ba09c1f5c' 
  AND token = 'dgeaoC56+2i+hhsYC+FxwLIBrwfet7K6D47I2u4HAyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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