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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'faa6a2266f8578d848d250a0e3270da8ac6619313faeb976171b2cdda115d67c' 
  AND token = 'mdEPeZD5rRAnjwrs6Ms3bpXDP/Hv3VhiYeSn4rx4Id0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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