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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '092eb9393b3dd544c086c83a1b503dd1454032d21d4e8bd0f57a03ed5c80be96' 
  AND token = 'aHggprRftPOB5o21AxKrapzLaCFmSHY4XQ0dat367Vw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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