SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32102c28f2ce279d076d69ecf02594ca35ff3c906b52381fd179fb1d0a43ff4c' 
  AND token = 'FJi5B6yTpWA1SFOj4+xWgR/HAudQD7zNSKDCn2DJIss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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