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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f44ed909fc4da7ac2a9fe175344af3c23c7a8c47024db50112a85c192b5040b5' 
  AND token = 'xZA4EGov75zGjWshZCaBM5L0RmrsAlTV0xoXEmSxhyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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