SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd602ec54be6622fffdffb75c72850fa641304d8ee69932d31c8a4ca4bf5e7e2' 
  AND token = 'rjdty/gwkVJ+pLjF/owHu3jxjJC8MnzdGfzZ0SH0FYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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