Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22ef7c0712643090f5597655e21f7e5f97e34822e430bc0546b227478c973d44' 
  AND token = '7mgxeZ15hSVQ4xp4p3N9PmBuGGoz1DwTETMjABf//iY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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