Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c4b35d4988fcb29e40955159c7766c3d260c2a4991364119461667a66fa913' 
  AND token = 'CPsiRY7WMK46iYMDvLV9/Nl+z4ZWGVpi8F7Cmr9b5c0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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