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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24ba83f21adf30e9f662738bcf59b1a89721c16f1129bc35519d1c2cd68e3399' 
  AND token = 'ypN3C/dyfLviOHQoTh9cdhhfGX4DEibn6ti/92IRFB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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