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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0501db6c94bb69dfec6dc9bf546954cbb6fcc0844ac9a2f53e69a869114ea0dc' 
  AND token = 'etntAn95hNJaPXbybWJ/8eiSJfm+1EEHsae5jmgTX/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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