SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ec9f50e97facb3e82d38fd6696f1fa15f256c6517e51d19ea4d8252631980d5' 
  AND token = 'LPKC8aoh7ywFB4hmbz2/6uAM4RrLSQtqCRokSkXYH5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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