SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72d1b52fc3fc7926fd066f5065447b8ff823efe1086e60af92239d11633629fc' 
  AND token = '3l1ZWGKWakGqoHSWkszrjlYNEzga3EAIqWm4vB9bWIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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