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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9bb1b172c4a5d6e7eca3096f95812ec27d60a42678e4dc3a6acadb001a717e65' 
  AND token = 'Zq1DIi/C/qgY/GIuL/lmKE7xelw12nMFw1Vpi6Z+7d8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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