SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '53221c6b106816fd7cce79b8bee66417bf88ad8e730e997ad328c8a26ae38745' 
  AND token = 'uzdCJtvPyNvR79O37iHZSdLjGfnu/5FCAKriUx6tFKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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