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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deb9071a31ecee0daea8ed4ea085a7e8a90d3727f1a08fde810a67c4c4ee5159' 
  AND token = 'hbDuzvlDk7yVE+TD+tgjhYu7agVudAc49secP3IMSdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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