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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0590dae0fc179db7ab4c6371a8d33cab37f858ba9835c4be97350e05fa094444' 
  AND token = 't4p1JI2teCbO4bxwyi29RdyecMfRjKmfQC/jAnsu8us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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