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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '004994fe4059b19ad28392c3a4cb7706816b6add87c63e6ac37c7995f2ef7dff' 
  AND token = 'R8L6liaelKgu5ErBHpQYgfwMvXyfGEf3Wo/QJfLm/rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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