Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de9aa259e29160688a7204294df9286af4755d869892e2e99a52344070187249' 
  AND token = 'NLC7VCTPz8HMlbosz4bY1nGCFXDc9T96zmtJPdGDqIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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