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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '232361589aa5b9bcf485c531376be8cc100928f73e8e4ff9182db3ca8b545e7b' 
  AND token = 'Vjwl5SwEKvN8/0eoh2hclju/xMUGSua7PNSl1SFC9yM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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