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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95569ce626ce04821c6a699777a43702e8e206adacc510de24673d5901a8002d' 
  AND token = 'T00X/E2dJyNK5yK/UZXQu7okIPkhEMh11BJr35+O940=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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