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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '057c73f072386bb26f1d816f85e7230d354cf5688cb4184cc270d55b5c4a2efd' 
  AND token = 'zgQOcEkfc6y6kleK0FxgsdtUAfoDB1hOM/k/xHHcopQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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