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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95445fb5f0ff6df091dfe4286ccbb40e1e03cb6c7e0588a960bf93ef0d956c8f' 
  AND token = '7KHUfYO6V6bqZOop8sTFMcF0+i8O6XaQIWPKt4WPD80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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