Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ced23336f7cfdcd8ed5d55b0dc4eccfef172bb39bb02d3c95eb2315b43e4316b' 
  AND token = 'fsnlGhp13TDtitPOCwBX1qsEtcJlzUVVcoaHVWFvZXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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