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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59ee07c8e4892015578bfa84bd4db17a6a3beb56151f89c8149730df7011ed67' 
  AND token = 'Il85V36AZidfTS7YhaSCX4iIsnBQ5ysVSsYdPZ+zU6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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