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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d04469f10fe809fe0e0aa695ccaa3ca667fb612db4dbf5162bedd7f34b7db4c' 
  AND token = 'bP6CyvOdWdCUANk+OBaOH+RLJZEdSX9d1LBZTaJPC3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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