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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa6edb2d9e7e8126a842f070a89186fd55b02d9e13dfdb3a9f8c1f064bab7e20' 
  AND token = 'NqvK4H9FFy7lVmKcdR+tSP/h13Wm9YC7L8tWgyy/Wlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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