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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9369a913fe65dfc4167bfddf9c30a85f20c84ad79c9b77fae147b09fcb26b7e' 
  AND token = '59PX0kSLfD2HFxWNNIm+7INnAuBRcQfZgBpIFmnmadA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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