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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dde00f1a72d80a71decbadaf8ce017404ba678d04f320376b4d693a0a687f8a' 
  AND token = 'j8fQ3oKjqzgbMnGqGs4d47TbZOa2de7MvKX2kVgfm98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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