Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8f87270161e637345e4a4631ed553ea56ecefca2f475ac130a6945184d7cf5e' 
  AND token = 'OqLuU8qLzKsr7dBoe2Z+1US+swW2a3yDoz11sLtkGGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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